how VW have gone back to 16 Valves for the MK5 GTI?!?! Why is this after the huge success of the 20VT engines across the entire VAG range?
most asked question on the forum soon! I heard its because they had to find room for the FSI injector so they lost a valve to make room for it in the head.
I would have said that as well. I was reading a bit on the "Puma race engines" site a while ago, and the chap on there doesn't think much to the 20v engine - although I think this is more to do with the amount of peak power that can be extracted rather than any stock power running issues.
oh yeah should really of done a search first So VW decide 20 valves aren't much better than 16 after all that... seems kind of a step backwards to me.
VW are going to offer a 230bhp lightweight version of the GTI apparently. So its tuneable, bigger turbo remap etc.....im sure the tuners will be on the ball when they figure the engine out.
I think he meant its not a good head for N/A engines, because you cant run really wild high lift cams, its perfect for big power turbos. P.S. from what I've heard FSI is crap, am I right in thinking it doesnt always run in direct injection mode all the time anyway,
That was flatly contradicated in 'Car' magazine in this months article. VW said it wouldn't be done because it would be too expensive to lighten (135 per kilo lost!) and wouldn't sell in sufficient quantities. Cheers, Drew. Edited by: drew
20v not so good for turbo as 16v and no room in 20v head for fsi http://www.seatcupra.net/forums/showthread.php?t=14316&highl ight=valves Edited by: edc1
cheers for the link edc1... think I can see why VAG are reverting back to the 16v. oh and I can splle hnoest its these damn dyslexic keyboards
Yamaha R1 is 20v new toyotas are 20v too. VAG have dorpped the middle valve so they can run fsi injector as said before. these fsi engines are gunna be a c**t to tune with anything more than a 20% gain IMHO. finding replacement injectors to cover the higher output is gunna be tricky.
